+23Mar23=======================================================================
+1. Fix DXCIDR brokenness introduced recently, speeded up DXCIDR::sort, allow
+ sh/badip 2a05:dfc7:402a::1 45.134.225.96 159.69.38.160 to test individual
+ IP address as well as show the default (of every badip).
+2. Speed up and be more strict with input for is_ipaddr(<ip address>).
+22Mar23=======================================================================
+1. Fix warning in DXUtil::difft.